Type-writing machine.



E. E. BARNEY.

TYPE WRITING MACHINE.

APPucATloN FILED SEPT. 2o, 1916.

Patented Nov. 12, 1918.

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INVENTDR WITNEEEEE HIEATTURNEY.

STATES PATENT OFFICE.

EDWIN E. BARNEY, OF ILION, NEW YORK, ASSIGNOR TO REMINGTON TYPEWRITER COMPANY, 0F ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Nov. 12, 1918.

To all whom t may concern:

Be it known that I, EDWIN E. BARNEY, citizen of the United States, and resident of Ilion, in the county of Herkimer and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification. j.

My present invention relates to locking devices for screws or bolts, and its general object is to provide improved devices of the character specified.

My novel screw locking devices have been.

designed more particularly for use in typewriting machines in connection with the adjustable screws that regulate the tension of the restoring springs for the key levers, and the special object of the invention is to provide new and improved devices for setting or locking said screws while alfording independent adjustments thereof in order to vary and regulate the tension or force of the springs with which they coperate.

To the above and other ends my present irrvention consists in the features of construction, combinations of devices and arrange ments of parts hereinafter described and particularly pointed. out in the claims.

In the accompanying drawings,

Figure 1 is a fragmentary front to rear vertical sectional view of the lower portion of a front strike Remington typewriting ma. chine embodying the preferred form of my invention.

Fig. 2 is a transverse sectional view taken on planes indicated by the broken dotted line a: in Fig. 1.

Fig. 3 is a fragmentary plan view of the supporting bar.

' Fig. 4 is an enlarged fragmentary sectional view showing my improved devices 1n connection with one of the key levers.

Fig.`5 is a bottom plan view of apart hereinafter termed a stud.

Asappears from Fig. 1, the base 1 o f the main frame of the Remington typewriting machine has arranged within it a set of key operated elements or key levers 2 which are fulcrumed at 3 in rear of the base, the key levers each being provided with a key cap or button Ll and being connected as usual by devices comprising links 'with type. bars of ordinary construction not-*herein disclosed. Each key lever as heretofore is provided with an individual restoring spring 6 which l assists to restore it and the parts connected to it to normal position after operation. In-

guide for it. The lower end portion of each spring fits loosely over and is guided by the upstanding shank 7 of a slidable member or stud 8 which further comprises a head 9, the shape of which best appears in Figs. 4 and 5. This head is generally round but has two diametrically opposite triangular lugs or extensions 9a projecting from it. It. will be understood that there is provided a set of these studs associated with each spring 6. The studs 8 are arranged in line with each other across the machine and are slidably mounted in vertical guide holes 10 formed transversely'in a supporting bar or part 11, a partial plan of which is shown in Fig. 3. rlhis bar is arranged in the lower portion of the base 1, extendingtransversely of the base, and having its ends suitably secured as by screws 11EL to the sides of the base so that the bar may be readily detached and replaced. The holes 10 are formed by first drilling the bar, providing round holes, then tapping these holes to provide threads for the adjusting screws hereinafter described, and finally broaching the tapped holes or cutting them with a broaching tool, so as to shape them properly to receive the heads of the studs or members 8, the fit of theV heads being such that the studs may slide readily up and down in the holes but are prevented from turning by the engagement of the extensions 9a with the corresponding portions 10a of the holes 10.

' Across the head of each stud diametrically opposite from the projections 9Il is formed a small concave groove or slot 12 which is engaged by a projection or tongue 13 milled on the inner end of an adjusting screw or bolt 14 which is provided at its opposite or lower end with a nick or driving slot 15. This screw is entered in the associate tapped and broached hole 10 at the bottom and advanced upward by screwing it in until it properly cooperates with the groove or nick 12 in the associate stud 8. It will be apparent that the vcompression spring 6 re-acts from the key lever 2, which provides an unvarying normal position for its upper end, and presses downward through the hole in which it is partly seated or housed on the head of the stud 8 so that there is a constant downward ressure on the stud, tending to lower it in its hole 10. This action of the stud is transmitted through the projection 13 to the screw 14 with the resulting tendency to bind the threads of the screw against the. threads in the hole. In other words, the interposed member or spring pressed stud 8 exerts a locking or holding eect on the screw which tends to maintain the screw set in adjusted positions. The construction is such that a,

ready adjustment of the tension of the spring 6 is afforded by screwing the screw 14 in or out. In either case it will be plain that when the screw is first turned the projection 18 will coperate with the groove 12 to exert a camming action on the stud or member 8, the result being that the stud will be forced upward as the projection 13 turns transversely of the groove 12. The turning movement or' the crew 14 will be continued until a half turn ,has been completed, whereupon the projection 13 will rengage with the groove 12, but as a result of the turning movement of the screw the stud will have been raised a distance corresponding to half the pitch of the screw thread'and the spring 6 will have been correspondingly compressed. Similarly by unscrewing the screw 14 the tension of the spring may be correspondingly lessened or relaxed. The construction provides for varying the tension by compressing the spring or relaxing it by moving the slidable stud or abutment 8 stepby-step to predetermined extents, theseextents being equal and corresponding to halr1 the pitch of the screw; that is, the screw or rotary tension adjusting member must be turned in a half turn before it can be set by coperation with the groove 12 or turned out a half turn to arrive at the same result. Ob-

viously the only way in which the normal tension or tendency of the spring 6 to expand can be varied is by turning the rotary adjusting member o`r screw 14 either in or out, and as it is clear that any accidental turning of the screw will be resisted by the sloping or Cam sides of the notch or groove 12 acting against the projection or tongue 13 with the full expansive force of the spring 6 behind it, the construction provides an effective locking or holding means to prevent accidental rotation of the screw 14 and consequent alteration of the force of the spring 6. While the screw may turn slightly at times as the result, for example, of j arrings incident to the operation of the machine, it is clear that the slipping sides of the groove 12, acting as cams` will exert a corrective eifect and restore the screw to the position from which it was jarred or otherwise accidentally moved or turned.

Various changes may be made without departing from my invention and it may be applied to machines other than typewriting machines and in which the spring cooperates with a part 0r device not a key lever.

What I claim as new an desire to` seeure by Letters Patent, is:

1. The combination of a compression spring, one end of which has an unvarying normal position, a screw, and a member interposed between the other end of said spring and said screw, said member ltransmitting the effect of the screw as it is turned to the spring, said member being provided with devices which assist to prevent its own rotation and being also provided with de- 3. The combination of a compression,

spring held at one end, a member provided with a cam coperative with the other end of said spring, and a screw for controlling the tension of said spring, 'said screw having a part coperative with said cam.

4. The combination of a coiled spring and tension adjusting devices therefor which permit predetermined extents of variation in the compressive force of said spring, said means comprising a slidable grooved member and a screw that engages in the groove in Said member.

5. The combination of a coiled spring, a member comprising a grooved head and a shank, a spring fitting over said shank and engaging withsaid head, and a rotary member coperative with the groove in said head.

6. The combination of a coiled spring, a member comprising a grooved head and al shank, a spring fitting over said shank and 4 engaging with said head, and a threaded member having a projection engaging in said. groove.

7. rlhe combination of a coiled compres sion spring, a part provided with a hole in which said spring is partly housed, a guide member for said spring slidable in said hole, and a tension adjusting member rotatable in said hole and thereby controlling the movements of said guide member, said guide member being provided with devices which assist to prevent its own rotation in said hole and also being provided with devices which assist to prevent accidental rotation of said tension adjusting member.

8. The combination of a coiled compression spring, a part provided with a hole in which said spring is partly housed, a guide member for said spring slidable in said hole, and a tension adjusting member rotatable in said hole and thereby controlling the movements of said guide member, one of said members being provided with a transverseV groove and the other with a projection engaging in said groove.

9. The combination of a coiled spring, a part provided with a threaded hole having broached sides, 'said spring being partly housed in said hole, a screw threaded into the opposite end o said hole from .said` spring, and a member slidable in said hole in one direction by said screw and in the opposite direction by said spring, said member engaging with the broached sides of said hole which prevent its rotation.

10. The combination of a coiled spring, a part provided with a threaded hole having broached sides, said spring entering said hole, a screw threaded into said hole, and a member slidable in said hole andagainst which said spring abuts, said member engaging with the broached sides of said hole which prevent its rotation and being provided with al cam coperative with said screw.

1l. In a typewriting machine, the combination of a key lever, a slidable member, a coiled spring confined between said key lever and said slidable member, and means for aording step by step adjustments of said member through equal predetermined extents of movement..

12. In a typewriti-ng machine, the combi-p nation of a s et of key levers, a set of coiled restorlngsprmgs, a cross bar provided with a series of holes, a set of members slidable in said holes and coperative with sald springs, and a set of screws'threaded into said holes and coperative with said mem-' bers, said members holding said screws against accidental displacement.

` 13. The combination of a bar provided with holes, a plurality of compression springs partly housed in said holes, key controlled members with which said springs cooperate, rotary tension adjusting members, and slidable parts interposed between. said adjusting members and said springs, said slidable parts holding said tension adjusting members against accidental displacement.

14. The combination of a bar provided with a series of holes arranged in a straight line, compression springs `partly seated in said holes, rotary tension adjusting members in said holes, and slidable members in theholes between said rotary members and said springs, said slidable members coperating with said rotary members to prevent displacement thereo'.A

15. The combination of a bar provided with a set of tapped and broached holes, screws threaded into said holes, slidable studs in said holes transversely grooved to coperate with said screws, coiled springs partly housed in said holes and engaging with said studs, and a Series of parts on which said springs act.

Signed at Ilion, in the county of Herkimer and State of New York, this 18th 'day of September, A. D 1916.

EDWIN E; BARNEY.

Witnesses:

GEORGE B. BRAND, CHARLES E. MAURICE. 

